I first encountered NT 4.0 at age fifteen in 1996 and realised what a huge jump it was compared to the dOS/Windows 3.x/Windows 9x lineage. I went on to use it for the rest of the nineties and I was a beta tester for NT 5.0 (which later became Windows 2000). I jumped ship in 2003 and switched to MacOS X before XP SP2 was released. I feel a strange sense of familiarity but also alienation whenever I have to use a Windows machine nowadays.